Big Furry Monster All the way back in 1998, long before double-faced cards, MTG experimented with its first multi-sided card: B.F.M
Chip Size Guide: Package contents
The scarcity of the Alpha elemental avatars is definitely reflected in their prices with the non-foil variants going for north of $100 and data on the non-foil versions fetching well over $1000 (although the data is spotty)
It has a "fossil counter" mechanic that interacts with other cards
If you're thinking of trying out this format, there are quite a few banned cards: Balustrade Spy Bloodstained Mire Expressive Iteration Felidar Guardian Field of the Dead Flooded Strand Geological Appraiser Inverter of Truth Karn, the Great Creator Kethis, the Hidden Hand Leyline of Abundance Lurrus of the Dream-Den Nexus of Fate Oko, Thief of Crowns Once Upon a Time Polluted Delta Teferi, Time Raveler Undercity Informer Underworld Breach Uro, Titan of Nature's Wrath Veil of Summer Walking Ballista Wilderness Reclamation Windswept Heath Winota, Joiner of Forces Wooded Foothills MTG Historic banlist Historic is a digital format for MTG Arena, and is the app's largest constructed format, consisting of both old and new cards
Many game stores and comic stores sell used Pokmon cards and they might have gold cards available
